Evaluation of titanium brackets surface after immersion in sodium fluoride

Luciane Macedo de MENEZES, Eduardo Martinelli S. de LIMA, Susana Maria Deon RIZZATTO, Guilherme THIESEN, Marcus Vinicius Neiva Nunes do REGO, Marina Lúcia CUMERLATO, Patrícia ZARDO

Aim: to assess and compare the effects of fluoride (NaF 1.23%) on titanium and stainless steel brackets. Methods: Fifteen titanium brackets, divided in 3 groups were used: A) control group (no treatment on its surface), B) brackets immersed in NaF (60 seconds) and washed with distilled water (30 seconds), C) brackets with similar treatment to group B and submitted to brushing (15 seconds). Fifteen stainless steel brackets were used for comparative effects, divided in 3 groups, and submitted to the same described procedures. All brackets were evaluated by macroscopic (visual appearence) and scanning microscopy (Philips, model XL 30), before and after the procedures. Results: titanium brackets submitted to fluoride (NaF), groups B and C, presented discoloration (matte gray color) when compared to group A. Stainless steel brackets showed no color alteration. Conclusion: titanium and stainless steel brackets showed no change in surface roughness or chemical components when immersed in sodium fluoride solution.

Keywords: Titanium brackets. Corrosion. Sodium fluoride.

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